We need to conserve natural resources because there isn't an evidence
that these resources are going to last for a long time, considering
man's usual consumption of these resources.
There will come a time that
there are some natural resources that will be gone [especially
non-renewable ones and ones that are in high demand]. Conserving natural
resources reduces the rapid depletion of biodiversity and it maintains
the balance of the undisrupted ecology.
We can use alternative sources of energy instead of non- renewable ones.