How do city planners today hope to make American cities green

- setting aside large areas to plant trees.

- Properly setting up a system for waste disposal

- Controlling pollution.

Explanation:

- setting aside large areas to plant trees.

Trees naturally reduce the amount of CO2 and increase the amount of O2 from their photosynthesis process. Both will give benefit for the community in terms of health and slowing down Global warming.

- Properly setting up a system for waste disposal

Waste disposal system need to be separated into something recyclable and non-recyclable. Something recyclable can be used to create other products after cleaned and non-recitable need to be get rid off as soon as it's dumped to the environment. Waste that isn't managed properly can be extremely harmful to the environment.

- Controlling pollution from energy source

This can be done by reducing the tools/equipment's that rely on fossil fuels. In exchanges, Cities could start using a more environmental friendly energies such as solar or wind.

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two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.