Now the three problems that face us are "population source environment" which have the bearing with the groundwater resources directly and indirectly.

当今世界所面临的“人口、资源、环境”三大问题，都直接或间接地与地下水资源有关。

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Tourism is creating other problems for the local environment, too, including increased population density, over-dependence on wood as a fuel and construction source and the overgrazing and cutting of mountain slopes to feed livestock.

BBC: Everest's growing problem