A geyser (, UK: ) is a spring with an intermittent water discharge ejected turbulently and accompanied by steam. The formation of geysers is fairly rare and is caused by particular hydrogeological conditions that exist only in a few places on Earth.

Martian geysers (or CO2 jets) are putative sites of small gas and dust eruptions that occur in the south polar region of Mars during the spring thaw. "Dark dune spots" and "spiders" – or araneiforms – are the two most visible types of features ascribed to these eruptions.

PPC Ltd is a South African manufacturer of cement, aggregates, ready-mixed concrete, and fly ash. The company is headquartered in Johannesburg, and operates mainly in South Africa, Botswana, and Zimbabwe.

Geothermal energy in the United States was first used for electric power production in 1960. The Geysers in Sonoma and Lake counties, California was developed into what is now the largest geothermal steam electrical plant in the world, at 1,517 megawatts.

This is a list of operational geothermal power stations with a current installed capacity of at least 10 MW. The Geysers in California, United States is the largest geothermal power station in the world, with a nameplate capacity of 1,590 MW and an annual generation of 6,516 GWh in 2018.

PPC may refer to:

Cimerwa Cement Limited (CCL) is a manufacturer of cement in Rwanda with capacity of approximately 600,000 tonnes per year.

This is the list of companies that manufacture cement in Zimbabwe.

A cement is a binder used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel (aggregate) together.