: Carbon dioxide enters the atmosphere through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and wood products, and also as a result of certain chemical reactions (e.g., manufacture of cement).
Heat. Most germs die quickly at high temperatures. Water that has been boiled for 1 minute is safe to drink after it has cooled. If no other method of water disinfection is available, very hot tap water may be safe to drink if it has been in the tank for a while.ost germs die quickly at high temperatures. Water that has been boiled for 1 minute is safe to drink after it has cooled. If no other method of water disinfection is available, very hot tap water may be safe to drink if it has been in the tank for a while.
Generally, boiling water, allowing it to cool and then reboiling it does not present much of a health risk. For example, if you keep water in a tea kettle, boil it and add water when the level gets low, you aren't likely to endanger your health.he chemistry of the water changes when you boil it, because this drives off the volatile compounds and dissolved gases. There are many cases where this is desirable. However, if you boil the water too long or reboil it, you risk concentrating certain undesirable chemicals that may be in your water.