How to fight against global worming ?

You should read  this before continue this article..There are non-flying vacuum-like machines inside power company smokestacks. They are called "scrubbers." What they do is capture the CO2 coming up a smokestack before it gets into the air, and the concentrated CO2 is then gathered, transported and eventually shoved down a hole. Usually a deep hole, where it's supposed to sit for a long, long time.
The advantage is extra CO2 doesn't get into the air. The disadvantage: It's expensive to isolate CO2, expensive to transport, expensive to find and fill a hole, and the hole might leak.
The other possibility is to use less carbon. We rely on oil and coal and natural gas (all carbon-based) to heat ourselves, cool ourselves, light our homes, drive our cars, run our businesses. Carbon is, even now, cheap, abundant and releases energy easily. That's why it has been popular since the first cave person burnt a log. But carbon is not the only atom in town. We can shop around.

4 rivers declared ecologically critical

Bangladesh Inland Water Transport Authority (BIWTA) on December 15 declared the four rivers and its foreshores, adjacent to the capital, ecologically critical to save the rivers from encroachers and pollution.
They banned dumping sewage from home, industries and other institutions, setting up industries which pollute soil, water, air and sound and any work which can change the natural character of rivers Buriganga, Turag, Shitalakhya and Balu.