What is the contour interval in the image below?

Alow-pressure belt means the air is cold and dry warm and rising cold and sinking warm and moist

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes.b. it burns more cleanly than crude oil products.c. scientists have developed new ways of extracting it.d. during its extraction, groundwater can be contaminated.

Write a 150word essay describing the effect of people's activities on the environment in the region.