Shahreen Islam Mahin ( Bangladeshi Climate Activist) :  The biggest and most important issue at present is environmental pollution and adverse effects of global climate change.  Scientists have been saying for a long time that climate change is the result of human activity.  Due to the increase in global temperature, various natural disasters such as cyclones, tornadoes, cyclones, droughts, floods, non-rainfall, heavy rains, flash floods etc. are increasing.  As a result, the amount of human and natural resource loss is increasing.  As a result, billions of rupees of wealth are being lost every year. In the coming days, the entire world will have to face the challenge of climate change.  The natural disasters caused by climate change will have to be faced. For this, the youth will have to play an important role. The World Bank has warned that Bangladesh will suffer the worst climate change by 2100.  The report estimates sea level rise of three f...