sentence: Greenhouses usually have vents that can be opened to let excess heat out.
sentences_before: Gardening and growing plants in greenhouses is different from growing plants outside. No rain can get inside a greenhouse, so gardeners have to put water on the plants. As well, greenhouses can get very hot from the sun's heat, so gardeners have to make sure that it does not get too hot for the plants.
sentences_after: Some greenhouses have electric exhaust fans that automatically turn on if it gets too hot in the greenhouse.
concept_name: greenhouse
headings: Greenhouse Gardening in greenhouses
categories: Gardening Buildings and structures Home