Air pollution is harmful for many reasons such as, killing many flying animals, damaging people's lungs, and may cause global warming. To reduce the amount of air pollution, you can carpool and try to avoid burning bad gasses.
In the state of Virginia all vehicles must stop within 50 feet but not less than 15 feet from the closest rail on a railroad crossing if either indicated to do so or if an approaching train is visible.
Exception of cities or towns, the person driving any motor vehicle conveying passengers for hire, or of any vehicle conveying explosive substances or flammable liquids, must stop within 50 feet but not less than 15 feet from the closest rail of a railroad.
Answer: They created Terraces into the mountainside
The Inca dug into the mountain side and created Terraces, which allowed them to filter water down the mountain side, as well as make a steeper ledge, since they did everything by hand, with hand made hoe's made out of branches and stones, they where able to till the ground to plant the seeds. The mountainside dirt was very enriched with minerals, which made it perfect land for farming.
"psychosocial development" It contains 8 stages to progress through going into adult life (after age 18). Once all stages are completed the result is said to be the developed personality and morals of the person.