PLEASE ANSWER FAST!
2 answers:
Reforestation is when you plant trees. Generally they do this in places that they have cut trees down. They do this to replace the trees they cut down. Therefore reforestation is a positive impact
Urbanization is basically making land into a city. This is negative because it is destroying habitats that were previously there and the traffic will cause air pollution in the area around it. There are other negative impacts of urbanization but I can't think of any more at the moment.
Terrace farming is...oof Idk how to explain it... it's basically where they cut steps into hills and farm on them. I'll link a picture below so you know what it looks like. This is a good way to use all the land possible. It's also one of the best ways to decrease erosion. This is positive use of the land.
btw you put reforestation twice. Idk if that was another option or if it was on accident, but I wanted to let you know :)
There fore the answer is...
dun dun:
Urbanization!!!
Hope this helped!
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Answer:
8.354 nanometers
Explanation:
To treat a diffusive process in function of time and distance we need to solve 2nd Ficks Law. This a partial differential equation, with certain condition the solution looks like this:
Where Cs is the concentration in the surface of the solid
Cx is the concentration at certain deep X
Co is the initial concentration of solute in the solid
and erf is the error function
Then we solve right side,
And we need to look up the inverse error function of 0.001964 resulting in: 0.00174055
Then we solve for x: