Government Laboratory High School, Dhaka 2026

Humans can neither change the sun's radiation nor the earth's orbit around the sun. But they can control the increase in the amount of greenhouse gases and its effect on the atmosphere. Only during the last hundred years the carbon dioxide concentration has been raised alarmingly in the atmosphere and we humans can be held responsible for this. The main cause of the increase in carbon dioxide level in the atmosphere is the burning of fossil fuels. Since the end of the 19th century, industrial activities increased rapidly giving rise to many factories. These factories required energy, which was produced through the combustion of coal. Besides coal, other sources of energy such as mineral oil and natural gas were also burned to heat our houses, run cars and airplanes or to produce electricity. Nowadays, about 85 million barrels of crude oil are burned daily. Every time a fossil raw material is burned, it releases carbon dioxide into the air.

Therefore, it is clear that more and more greenhouse gases like carbon dioxide are being generated worldwide by humans. Moreover, we are also strengthening the greenhouse effect by deforestation, which means cutting down trees. Every year enormous areas of forests are destroyed by people to obtain wood and to clear regions for mining and to create pasture. This loss of the forest causes dual problems. Trees that are burned up release large volumes of carbon dioxide gas into the air. On the other hand, as forests absorb a lot of carbon dioxide from the air and deliver oxygen instead, we also destroy an important storehouse of carbon dioxide when we clear forests.

Pritilata Waddedar was born in Chattogram on 5 May 1911. She was a meritorious student at Dr Khastagir Government Girls' School in Chattogram and Eden College, Dhaka. She graduated in philosophy with distinction from Bethune College in Kolkata. In her college days, Pritilata was an activist in the anti-British movement. All through her life, she dreamt of two things: a society without gender discrimination and her motherland free from British colonial rule.

So she decided to fight against the British rule. Soon after, Pritilata became the head teacher of Nandankanon Aparna Charan school in Chattogram. Gradually she involved herself in Surja Sen's armed resistance movement. Surja Sen was a famous anti-British movement organizer and revolutionary activist in Chattogram area at that time. In 1932, Surja Sen planned an attack on the Pahartali European club. The club was well-known for its notorious sign at its entrance: Dogs and Indians not allowed. Surja Sen assigned Pritilata to lead a team of 10-12 men to attack the club. The raid was successful but Pritilata, dressed as a man, failed to get out of the club.

She committed suicide by taking potassium cyanide to avoid arrest. She proved that women can work like men. She also proved that women too needed to be prepared to sacrifice their lives for freedom from the British colonial rule. Her dream finally came true. The British rule came to an end in 1947 though she couldn't see it during her lifetime.