More than half of the breathable oxygen in the world comes from where?

Which gas contributes the most to greenhouse effects?

Name the activist who won the Nobel Peace Prize in 2004 and has contributed to various environmental causes?

What was the first organized proponents of eco-conservation, wildlife protection, and green living, which started around 290 years ago?

Which of the following ailments can be treated by prescription drugs derived from plants found in the rainforest?

What percentage of India's landmass is covered by Forests

Who was the leader of the Chipko Movement?

Over the past 151 years, sea levels have climbed by:

Which day is celebrated as World Earth Day?