Which of these is a renewable energy source?
AnswerWind
Wind is replenished naturally; fossil fuels are not.
Nature · Facts & stats
Green facts & stats
7 fact-checked facts about green living, recycling and sustainability, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What does composting turn food scraps into?
AnswerNutrient-rich soil material
Microbes break organic matter into humus for gardens.
Going deeper
Which light bulb type uses the least electricity for the same brightness?
AnswerLED
LEDs use a fraction of the energy of incandescent bulbs.
Aluminum cans can be recycled how many times?
AnswerIndefinitely without losing quality
Aluminum can be recycled over and over.
Earth Day was first celebrated in which year?
Answer1970
The first Earth Day was April 22, 1970.
Expert level
Which international agreement, adopted in 2015, aims to limit global warming to well below 2 C?
AnswerParis Agreement
The Paris Agreement was adopted in December 2015.
The Montreal Protocol of 1987 was designed to protect what?
AnswerThe ozone layer
It phased out chemicals like CFCs that deplete ozone.
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