I have never even heard of a red banana good luck :p
The answer is constructive interference because two waves meet at one point of the room and amplifies sound.
Well to me if the rate of industralization continues deforestation will increase which will lead to accumulation of CO2 in the atmosphere. Also if combustion of fossil fuels will also lead to high rates of C02 so unless measures are taken the rate of C02 in the atmosphere will greatly increase in the nearest future