Which of these protects the earth from harmful radiation when found in the stratosphere, but is a pollutant at lower altitudes?

The united states economy is one in which producers are generally free to produce what they want and consumers are free to purchase what they desire, so long as no laws are broken. at the same time, however, the government does regulate some aspects of the economy. the u.s. can best be described as which of the following a mixed economy b liberated economy c command economy d market economy

Where did the constitutional convention take place

What percentage of people are left handed?