Definition: In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.

Positive Example 1 -
Input: Fact: pesticides cause pollution.
Output: pollution harms.

Positive Example 2 -
Input: Fact: pesticides cause pollution.
Output: modern farming pesticide.

Negative Example 1 -
Input: Fact: pesticides cause pollution.
Output: computer harms.

Negative Example 2 -
Input: Fact: pesticides cause pollution.
Output: toopaste helps.

Now complete the following example -
Input: Fact: burning fossil fuels increases the carbon in the atmosphere.
Output: 


Output:
carbon atmosphere.
carbon in atmosphere global warming.
carbon in atmosphere.
carbon in the atmosphere can cause.
carbon in the atmosphere causes what.
effects of carbon atmosphere.
fossil carbon.
fossil fuel natural gas.
fossil fuel types.
fossil fuels carbon.
increased carbon in atmosphere.