A warm (goodmorning/good afternoon) to one and all present here. I (your name) is here to saw a few words on environment.
Environment is the surrounding in which we live. It is the source of life. Our whole life is dependent to the environment. It directs our life and determines our proper growth and development. Good or bad quality of social life depends on the quality of our natural environment. The need of human beings for food, water, shelter and other things depends on the environment around us. There is a balanced natural cycle exists between environment and lives of human beings, plants and animals. Human society is playing vital role in degenerating the natural environment which in turn negatively affects the lives on this planet. All the human actions in this modern world directly impact the whole ecosystem.
I conclude my speech by saying "Better environment, Better world."
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 In today's parlance if somebody can understand the meaning of environment, it is everything. That means whatever we do, affects our environment. So, before doing anything, ask yourself a Q, what will be the impact on environment of my this action, is it necessary, is there a better alternative. After getting these answers consciously, go ahead. 
Now environment means- air, water, land, jungles, all leaving beings. 
All these can be elaborated further. Like whatever fossil fuels we are burning, we are releasing more and more carbonic gases to the atmosphere, thereby depleting ozone layer, increasing global warming, inviting more diseases etc etc. 
We are using water as freely available commodity, without giving much/concrete action and polluting whatever is available at a jet speed. Today there are more sales of Water purifiers than much earlier. Just imagine you without water. 
Land is being spoiled by polluted water and solid waste disposal. 50 years back there was no term like solid waste management, because many of the thing were recycled and reused like 'to my last drop of blood'. 
Jungles are being cut at a compounding speed than growth, leave aside planting new ones. Thus we are reducing our oxygen bank, like we are reducing our bank balance after retirement. So ultimately------Death. Be ready for that, because still no action is being taken at any level, only talks, conferences and budgets are done.