Yes that's true of course during it's lifetime .
and , replacing plastic bags by biodegradable or natural fabrics will save earth
500 billion non-biodegradable bags that will end in land fills
small changes can make difference , please be active and don't just listen to those who
tries to tell the global warming is a mere myth , let's say it is a myth , is it harmful if we are just showing care towards our environment
it wont be a burden once we are used to it , this must be part of our culture , integrated in our minds
if you want to know more of what's happening and want to be active
check these website
http://www.greanpeace.com
http://www.nationalgeographic.com/changingknowledge
Only through knowledge we can save the world from the point of no-return.
act now.