glacier - n. a very large area of ice that moves slowly down a slope or valley or over a wide area of land

assessment - n. an idea or opinion about something

bare - adj. not having a covering

hydropower - n. electricity produced from machines that are run by moving water

vulnerable - adj. open to harm or damage

greenhouse - adj. relating to or caused by the warming of the Earth's atmosphere that is caused by air pollution : relating to or caused by the greenhouse effect

emission - n. the act of producing or sending out something (such as energy or gas) from a source