'Wolbachia method' is sometimes talked about with reference to which one of the following?

Consider the following activities:

1. Spreading finely ground basalt rock on farmlands extensively

2. Increasing the alkalinity of oceans by adding lime

3. Capturing carbon dioxide released by various industries and pumping it into abandoned subterranean mines in the form of carbonated waters

How many of the above activities are often considered and discussed for carbon capture and sequestration?

Consider the following heavy industries:

1. Fertilizer plants

2. Oil refineries

3. Steel plants

Green hydrogen is expected to play a significant role in decarbonizing how many of the above industries?

Among the following crops, which one is the most important anthropogenic source of both methane and nitrous oxide ?