How is the production of mercury from burning coal an environmental hazard?
a.
High concentrations of mercury in the air leads to global warming.
b.
Mercury in water systems is transformed through biological processes into a substance that is toxic to animals.
c.
Mercury combines with other coal emissions in the air to produce ozone.
d.
All of the above

__1__ is a climate cycle where the temperature of the __2__ ocean changes because of movements of air and ocean currents. during this period, the trade winds in the south __3__ , causing the __4__ water to move from the __5__ region to the __6__ region. 1) el nino or the monsoon 2) atlantic, indian, or pacific 3) reverse, strengthen, or weaken 4) cold or warm 5) eastern or western 6) eastern or western

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Which two factors contributed to creating a global culture? the creation of the united nations improvement in telecommunications health issues such as the ebola virus increased opportunities for global travel