List four costs (negative aspects) of using fossil fuels in thermal power stations.

Paying for fuel

Paying for disposal of waste products used in remediation

Paying for clean up of spills

Paying for ads to counter negative publicity from people who think that wind or solar can replace those fuels in the near future.

they should be similar or the same

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )