How to preserve mt. everest

Clean up expeditions on Mount Everest to remove approximately 8 tonnes of rubbish from the mountain. Installing local rubbish and recycling facilities along the trekking route from the airstrip at Lukla to Everest Base Camp.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.