Which of the following could be done to reduce global warming trends
a.) plant more trees
b.) bottle more water
c.) raise more live stock
d.) build more schools

As seen in a us weather map, the h (or high) and l (or low) symbols indicate regions where surface air pressures are high or low, respectively, compared to surrounding areas. an h is plotted where the air pressure is highest and an l is plotted where the air pressure is lowest. proceeding outward and away from the center of a high pressure system, the air pressure "