What is Man doing to the plants?

As time passes, Man starts to forget what Plants were for, Man starts to have greed, Man starts to destroy Plants to manufacture what they desire, in ancient times, plants were abound, so Man thought that there were enough for all, thus, Man started to chop down trees for firewood and lumber.
Compared to modern times, Man is still doing the same, though less in numbers, hectares of forests are being cleared daily despite threats by their Government. The Rainforests once covered 1.5 to 1.6 billion hectares of this planet, now left with about half,due to excessive deforestation by Man