Minerals, organic matter, water and air.
Answer:
around 23-24%
Explanation:
In the city of Rio, close to 1.5 million people – around 23-24% of the population – live in favelas. That's comparable to the percentage living in affordable housing (public, rent controlled, cooperatives, community land trusts and other models) in major cities worldwide.
The correct answer for the problem is 2 cylinders. Taking the volume of each cylinder gives a value of around 180 cm^3. Since the volume of one solid block is 360 cm^3, the value should be divided by the volume of the gold cylinder to know how many cylinders are needed. Dividing 360 by 180 gives 2.
Water shortage, domestic waste, coastal erosion
