In the passage below, the numbered gaps missing words. Against each number in the list below the passage, five options are offered in columns lettered A-E. Fill each numbered gap with the most appropriate of the options.
Environmental ---------26------ refers to activities aimed at improving and ----27--- the standard of basic environmental conditions affecting the -----28----- of people.
You can achieve a ----29--- environment by regularly cleaning and ---30--- your house and ---31----- properly ---32----- your----33----- through covered trash ---34---- or disposable waste bags rather than ---- 35-----

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