Question

it is said that it takes thousands of years to form a thick layer of soil but everyday it will be thousand years then how can we say that soil erosion is harmful?

Answer 1

The soil which is blown away from a particular place will only replenish after millions of year so yes u r right but its incomplete fact. The soil takes millions of years to form its a very long time but the erosion is taking place at a hifher rate than its getting replenished.

Answer 2

Every beginning as its own ends, the presupposition is correct but u lag data. It will take 1000 years to form soil, but it is not assure that every day the process starts. Do u think today a new soil started to produce? Absolute no. So the process of formation of soil ended already and we are exploiting it now.
If ur idea was true why do we fear of shortrum of resources... Even coal takes 100000 years to form.
Think....