Question

2/29
which one of these does not add co2 to the atmosphere?
burning wood
riding in a bus
cooking with gas
planting trees

Explanation:

• Burning wood: Combustion of wood releases $\ce{CO_2}$ as wood is organic matter (carbon - based), and burning it oxidizes the carbon to $\ce{CO_2}$.
• Riding in a bus: Buses usually run on fossil fuels (like diesel or gasoline). The combustion of these fossil fuels in the bus's engine produces $\ce{CO_2}$ as a by - product.
• Cooking with gas: Natural gas (mostly methane, $\ce{CH_4}$) is burned for cooking. The combustion reaction $\ce{CH_4 + 2O_2\xlongequal{burning} CO_2 + 2H_2O}$ produces $\ce{CO_2}$.
• Planting trees: Trees perform photosynthesis, which takes in $\ce{CO_2}$ from the atmosphere and converts it into glucose and oxygen ($\ce{6CO_2 + 6H_2O\xlongequal{light, chlorophyll} C_6H_{12}O_6 + 6O_2}$). So planting trees helps in reducing the amount of $\ce{CO_2}$ in the atmosphere rather than adding to it.

Answer:

planting trees