Questions

Decomposing waste in the landfills, by the action of microorganisms, produce methane and carbon dioxide. Landfill gas consists of 40-60% of methane and rest is carbon dioxide. Trace amount of volatile organic compounds (<1) are also present which mainly comprise of hydrocarbons.

Peacekeeping is flexible and over the past two decades has been deployed in many configurations. There are currently 14 UN peacekeeping operations deployed on four continents.Today's multidimensional peacekeeping operations are called upon not only to maintain peace and security, but also to facilitate the political process, protect civilians, assist in the disarmament, demobilization and reintegration of former combatants; support the organization of elections, protect and promote human rights and assist in restoring the rule of law.

UN Peacekeeping operations assist in moving state out of conflict towards peace but doesn’t assist a losing state in war.

Voter Verifiable Paper Audit Trail (VVPAT) machines are used during election process to verify that the vote polled by a voter goes to the correct candidate. VVPATs are a second line of verification particularly and are particularly useful in the time when allegations around Electronic Voting Machines' tampering crop up.

From the given options, a power plant uses a nonrenewable energy source to make electricity. A power plant uses coal for making power production.