For example, small rounded pebbles known as pea gravel are commonly used for pathways ... in the tire treads and can be mixed with clay or sand to give it even more smoothness and stability.

Of the more than 20,000 bee species in the world, 70% nest in the ground. And like many of their counterparts that nest above ...

“Sand and gravel represent the highest volume of raw material used on earth after water. Their use greatly exceeds their natural renewal rates” (UNEP, 2014). Each grain of sand originates from rock on ...

Many social media users have uploaded photos and videos of vehicles and areas near their homes 'showered' with sand and fine gravel. A Facebook user Azizee Bos Abul Habis wrote, "The whole of ...