<span>one of the main safety concerns involving teak surving is: </span><span>carbon monoxide build up around the swimming platform which can injure or even kill the people who are teak surfing and being close to a spinning propeller. The carbon monoxide could make the surfer to lose consciousness during the surfing activity.</span>
A because due to a lot of gas/smoke in the air people in japan wear mask due to the dangerous gas
Currents distribute heat because they take warm water from the equator to the north and colder places making the water warmer there
I'm assuming that you mean currents with water sorry if u aren't