* The images, taken by NASA's Terra satellite, show a significant decrease in nitrogen dioxide levels over China in February 2020 compared to February 2019.

* Nitrogen dioxide is a pollutant that is produced by burning fossil fuels, and it is linked to respiratory problems such as asthma and bronchitis.

* The decrease in pollution is likely due to the slowdown in economic activity in China as a result of the COVID-19 pandemic.

The images provide a striking visual representation of the impact that human activity can have on the environment.

* The dramatic decrease in pollution over China shows that it is possible to make a significant positive impact on air quality by reducing our emissions of fossil fuels.

* This is a promising sign that we can take action to address the global problem of air pollution and its associated health risks.

The COVID-19 pandemic has had a devastating impact on the world, but it has also provided us with an opportunity to learn more about the impact of human activity on the environment.

* The images of the decrease in pollution over China show us that it is possible to make a difference, and they inspire us to take action to create a more sustainable future for our planet.

Here are some things that we can do to help reduce our emissions of fossil fuels and improve air quality:

* Drive less and walk or bike more.

* Use public transportation instead of driving whenever possible.

* Turn off lights and appliances when you leave a room.

* Unplug appliances when you're not using them.

* Recycle and compost.

By making small changes in our everyday lives, we can all help to make a big difference.