Yes, it did help to change the world climate
for example by the Carbon Dioxide released from factories, Cars and even from respiration
The correct answer is helium nucleus. An alpha particle has a two neutrons and protons that formed together into a particle which also happens to be very identical to the helium nucleus. However, the helium particles that are being produced by particle accelerator are less to be referred as an alpha particle.
Copernicus started a scientific revolution with his theory that, D the Earth revolved around the sun.
Solids have a defined shape and liquids don't.