• The Great Barrier Reef (GBR) is facing an existential threat due to rapidly changing climate conditions and rising sea surface temperatures (SST), which have now reached their highest levels in over 400 years.
• Recent assessments by scientists reveal that ocean temperatures at the reef are hotter than they have been in the past 407 years, endangering an ecosystem larger than Italy. By analyzing samples from centuries-old corals, which record temperature data within their skeletons, along with climate models, scientists have confirmed that the GBR is under unprecedented threat.
• Research led by Benjamin Henley, an Honorary Fellow at the University of Wollongong and Lecturer at the University of Melbourne, underscores the significance of these findings, especially since the world heritage committee has not officially listed the reef as "in danger."
• The reef has endured five mass bleaching events within the last decade. Published in the journal Nature, the study titled "Highest Ocean Heat in Four Centuries Places Great Barrier Reef in Danger" reveals that all mass coral bleaching events recorded between 2016 and 2024 were driven by elevated SSTs—a phenomenon that cannot be explained without considering human influence on the climate.
• The study highlights that human activity is responsible for the rapid warming seen in recent decades. The ongoing mass coral bleaching event has resulted in the highest recorded temperatures, with SSTs 1.73 degrees Celsius above the average. Previous mass bleaching events in 2016, 2017, 2020, and 2022 saw temperatures rise by 1.5, 1.54, 1.53, and 1.46 degrees Celsius, respectively, recorded between January and March.
• Scientists at the Australian Institute of Marine Science have identified the current mass bleaching event as the most widespread and severe to date. Coral bleaching occurs when heat stress causes the separation of dinoflagellates—a single-celled organism with two flagella, commonly found in marine plankton and freshwater.
• Bleaching can also result from low salinity, cold waters, or pollution, with regional and global mass bleaching events noted by the study. While corals can recover from bleaching, prolonged exposure and high intensity can lead to coral death.
• The study points out that the first modern evidence of mass coral bleaching at the GBR was observed in the 1980s, though these early events were less severe and widespread compared to those in the 21st century. In their research, scientists drilled into centuries-old corals at 22 locations, using stress bands in their skeletal structures to find evidence of mass bleaching events before the 1980s, including during the 1877-78 El Niño. These stress bands indicate that mass coral bleaching was not prevalent during the 1800s or most of the 1900s.
• However, as ocean temperatures began to rise around the 19th century with the onset of the industrial revolution, the GBR began to suffer more severe damage. The scientists reconstructed temperature records starting from 1618 and compared them with modern ocean temperature data. Their conclusion is that climate change, combined with coral bleaching, has severely compromised the integrity of the GBR, a site with World Heritage status

World Biofuel Day is celebrated annually on August 10 to raise awareness about the value of biofuels, which are derived from biological materials such as agricultural waste, animal waste, algae, trees, crops, and grass. This day aims to emphasize biofuels as a sustainable alternative to conventional fossil fuels, highlighting their role in reducing greenhouse gas emissions, enhancing energy security, and fostering rural development. It also provides a platform to showcase government initiatives in the biofuel sector and educate the public and policymakers on the benefits of biofuels.

Biofuels are eco-friendly and quickly produced fuels that can be found in liquid or gaseous forms. Unlike fossil fuels, they are renewable, biodegradable, and sustainable.

World Biofuel Day Theme

The theme for this year's World Biofuel Day is "Sustainable Biofuels: Reducing Waste, Feeding Energy."

World Biofuel Day History

August 10 was chosen as World Biofuel Day to commemorate the year 1893 when German inventor Sir Rudolf Diesel successfully ran his diesel engine on peanut oil. This breakthrough marked a significant step toward developing a safer, renewable, and sustainable alternative to fossil fuels.

In India, the Ministry of Petroleum and Natural Gas (MoP&NG) and the Ministry of Environment, Forestry, and Climate Change (MoEFCC) began observing World Biofuel Day from 2015. Biofuels such as biodiesel, bioethanol, and bio-CNG are increasingly being utilized in the country.

Significance of World Biofuel Day

As climate change accelerates, a shift toward renewable energy sources is crucial. Biofuels contribute to a cleaner environment and support the adoption of more sustainable technologies, helping to mitigate the environmental impact. On this day, the Indian government promotes the replacement of non-renewable fossil fuels with renewable energy sources. World Biofuel Day also serves as a platform to advance and strengthen the biofuel sector, offering lower carbon footprints and potential for income and employment generation

1.According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels? (UPSC 2020)

1. Cassava

2. Damaged wheat grains

3. Groundnut seeds

4. Horse gram

5. Rotten potatoes

6. Sugar beet

Select the correct answer using the code given below:

A. 1, 2, 5 and 6 only

B. 1, 3, 4 and 6 only

C. 2, 3, 4 and 5 only

D. 1, 2, 3, 4, 5 and 6

• The Kafala system is a sponsorship system used in several countries in the Middle East, particularly in the Gulf Cooperation Council (GCC) states, to regulate the employment and residency of migrant workers.
• Under this system, a migrant worker's legal status is tied to their employer, who acts as their sponsor (or "kafeel"). The sponsor is responsible for the worker's visa and legal status, and the worker cannot leave the country, switch jobs, or terminate their employment contract without the sponsor's permission.
• The Kafala system has been widely criticized for creating a power imbalance between employers and workers. Because workers' residency and ability to work are dependent on their sponsor, they can be vulnerable to exploitation, abuse, and poor working conditions.
• Employers may withhold workers' passports, delay or withhold wages, or subject workers to long hours and harsh conditions, knowing that the workers have limited options to seek help or leave the situation.
• Efforts to reform or abolish the Kafala system have been made in some countries, with varying degrees of success. Critics argue that the system is inherently exploitative and contributes to the mistreatment of migrant workers, particularly those in low-wage jobs such as domestic work, construction, and agriculture

• Key aspects of the new law include a daily maximum of 10 working hours, the right to a weekly day off, and a prohibition on the confiscation of identity documents. The law also emphasizes workers' rights to communication and allows them to terminate their contracts under certain conditions without losing their entitlements.
• Additionally, it provides for compensation in cases of unjust termination, grants workers one month of paid leave each year, and requires employers to cover the cost of an annual ticket home.
• Saudi Arabia has also introduced mandatory insurance for all new migrant domestic worker (MDW) contracts to protect both workers and employers, with the cost included in recruitment fees.
• In a significant development, the kingdom began including all new MDWs in its Wages Protection System (WPS) from July, with plans to gradually extend coverage to all existing MDWs by the end of 2025