HOOK

You don’t need a massive dam or a famous waterfall to generate clean electricity. Sometimes, a small stream is all it takes. Let’s dive into small hydropower.

HISTORY / ORIGIN

Water wheels have been grinding grain and sawing wood for over 2,000 years. But the modern idea of “small hydropower” (SHP) took off in the late 19th century when people started using turbines to generate electricity for remote homes and mills. By the 1970s energy crisis, governments and rural communities rediscovered SHP as a reliable, off-grid alternative to big fossil fuel plants. Today, small hydropower (typically defined as under 10 MW – and sometimes as low as 5 kW for “micro” systems) powers villages, farms, schools, and small industries worldwide, from the Himalayas to the Andes.

TYPES OF SMALL HYDROPOWER

HOOK

That smooth finish on your wall or the rust-proof layer on a bridge isn’t magic. It’s chemistry. Let’s peel back the layers of paints and coatings.

HISTORY / ORIGIN

Paint is one of humanity’s oldest inventions. Over 40,000 years ago, cave artists mixed crushed iron oxides with animal fat or water to create the first pigments. Ancient Egyptians and Chinese developed varnishes and lacquers using natural resins. The big leap came in the 19th century with the industrial revolution – mass‑produced oil paints, then alkyd resins, and later water‑based latex paints. Today, paints and coatings go far beyond aesthetics: they protect satellites in space, keep ships from rusting, and even clean the air around us.

TYPES OF PAINTS & COATINGS