Which of the following two are the main constituents of biogas? 1. Methane 2. Butane 3. Carbon dioxide 4. Carbon monoxide Select the correct answer using the code given below.

సమాధానం చూపించు & వివరణ

సమాధానం: (C) 1 and 3

వివరణ

Biogas is mostly methane (50-75%) and carbon dioxide (25-50%).