Trees on rooftops
We know that trees are the elements which produce oxygen (O2) and at the same time absorb carbon dioxide (CO2). They thus balance the O2 and CO2 in the environment, which is very important for human beings and animals as well. But in Dhaka city, the number of plants and trees is coming down to zero gradually. We need O2 but we live in CO2. So, I suggest that we grow plants and small and medium sized trees on every roof in Dhaka irrespective of whether they are privately or government-owned. I also propose that we make it compulsory. At first people should be motivated. After that, perhaps from 1 January 2009, some penalty may be imposed on those who ignore the matter. A minimum number of trees must be grown as per space available on the roof of a building. In this way we can get some more O2. Without O2 we cannot but die.
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