Concept:
World Environment Day is celebrated annually on June 5. It is the United Nations’ principal vehicle for encouraging worldwide awareness and action for the protection of our environment. First held in 1974, it has grown to become a global platform for public outreach.
Step 1:
The year 2022 marked the 50th anniversary of the historic 1972 United Nations Conference on the Human Environment held in Stockholm, Sweden, which led to the establishment of the United Nations Environment Programme (UNEP). To commemorate this semicentennial milestone, Sweden served as the global host country for World Environment Day 2022.
Step 2:
The official campaign slogan and theme chosen for World Environment Day 2022 was
"Only One Earth". This theme focused on "Living Sustainably in Harmony with Nature", highlighting the urgent need for transformative policy changes and individual choices to restore and protect our fragile planetary boundaries.
Step 3:
Let's evaluate the alternative options:
• Invest in our planet: This was the official theme for Earth Day 2022 (celebrated on April 22).
• Life on earth / Live with the nature: These are generic environmental phrases and do not match the official UNEP declarations.
Therefore, option (B) is the precise answer.