From a practical standpoint, it is difficult to use CO2 supplementation in a greenhouse during the summer months in Ontario. Why?    asap please

Explain virtual water and its role in water conservation. Provide 1 example of how you can reduce your virtual water consumption.✓✓

1.) a.Name two biological processes involved in rapid carbon exchange:     b.Name two geologic processes involved in long-term carbon exchange:

Air Pollution is a common contributor to health issues that is typically more abundant in urban environments. In this week's lab exercise you will examine levels of air pollution in the Phoenix Metropolitan area. The measurable levels of different pollutants indicate an overall air quality index (AQI). Anthropogenic sources of pollution (Carbon monoxide, Ozone) are a major contributor to higher AQI values but particulate matter (PM-10) is also important in determining an AQI score.   Choose all listed sources that would contribute to increased particulate matter (PM-10) levels. and EXPLAIN WHY YOU CHOOSE IT. DEFEND YOUR ANSWER choices: a. Water vapor from Tempe town Lake and local water parks b.Bovine flatulence from Shamrock Farms c.Dust from empty construction lots or a recent HABOOB! d. Pollen from Brenton's ridiculously diverse garden e. Helium expended from the NMR machine in Tempe