A Memory of Butterflies and Swallows

Yesterday, during my daily walk, a saw a butterfly. Not a particularly beautiful, colorful one. Just a small, white butterfly. As strange as it might sound, I was in awe. Why? Because butterflies have disappeared. As swallows. Not too many decades ago, you would see flocks of swallows flying and chirping all day long, and - especially at sunset - they would gather and circle together like children at play. It was a beautiful view. Butterflies of all colors and sizes would twirl around, briefly stopping on one flower, and then another, creating a Van Gogh-like scene. Meadows were quietly lively, skies were noisily cheerful. Now... no more! The flowing waters are not cristalline as they used to be, the air is not as pure and clean as it once was. It's a truly different world. Is it possible for it to go back to what it was?
Maybe... this is what is starting to happen right now!!!