All-Ukrainian competition of scientific works with international participation! We invite you to participate in the work. The deadlines for submitting applications and bids have been extended until the end of this month due to martial law caused by Russia’s military aggression in Ukraine. The competition is held for the International Mother Earth Day, World Environment Day, Inventor and Innovator Day! All participants will receive a certificate, a letter of recommendation and a collection of materials. We are waiting for you!!!