Cardiovascular disease in smokers is primarily due to the in cigarette smoke. a. nicotine b. tar c. carbon monoxide d. both a and c

explanation:

they can be good for the ecosystem

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a