what are the positive and negitive effects of surface changes due to human activities(erosion)?

Question

the erosion that happends and what humans do to think that makes it better but makeing it worse.

Answer 1

The positive effects:
as we (still) are humans, as we like to live in cities and buldings with water, eletricity, roads, TV, web etc, we have to change the Earth.
Changing the Earth (to dig after Iron, Gold, Clays, metals, fertilizers, petroil, water, dyamonds, stones, sands and gravels, etc.) we can get some satisfaction, confort, progress...

The negative effects - it depends.
If we are talking with an enviromentalist, the negative effects are HUGE, bláblablah

I like to remember that we (the human race) are from this Earth. We are not E.T.'s. We are 'natural', as a dolphin, a snake, a whale, a bacteria...