TASK DEFINITION: Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.
PROBLEM: Sentence1: erosion of soil has a negative impact on the environment. 
Sentence2: erosion of soil has a negative impact on forests.

SOLUTION: erosion

PROBLEM: Sentence1: Most bryophytes are small. 
Sentence2: Most in the same group as mosses are small.

SOLUTION: small

PROBLEM: Sentence1: Humans meet some needs and wants by using resources found in the natural environment. 
Sentence2: Humans have a negative impact on the environment.

SOLUTION:
Humans