envelope with a letter, pen, and stamps on light green background, izing eco-friendly communication

presentation advertising screenshot document diagram drawing cartoon pattern writing design sketch poster brand label text font line plan map sustainable practices sustainability business greener future green newsletter circular economy protect planet envelope letter pen stamps light background stationery mail correspondence postal service communication office supplies writing message postage eco-friendly earth stamp bird plant flat design paper sending tools vector art graphic modern clean simple minimalist artwork digital icon symbol open letter mail mailing creative pastel colors greeting note desk accessories