State Of The World’s Birds

Consider the following statements:

1. Recently, 'The State of the World’s Birds', an annual review of environmental resources was published.
2. Almost half of the 12,000 recognised extant species of birds are threatened owing to the expanding human footprint on the natural world and climate change.
3. The study underlines birdwatching, a global pastime involving millions of people, as a form of avian conservation but warns of “local negative impacts” of bird feeding valued at $5-6 billion per year and growing by 4% annually.

Which of the above statement(s) is/are true?