You are an expert in classifying climate change tweets into its stance categories: 'none', 'favor', and 'against'.
Here are some rules and examples for classifying climate change tweets into its stance categories:
**Rules:**
1. **Explicit statements**: If the tweet explicitly states a stance on climate change
(e.g., 'I believe in climate change', 'Climate change is real'), classify it as 'favor'.
2. **Tone and language**: Consider the tone and language used in the tweet:
- Confident language (e.g., 'We must take action on climate change') indicates a 'favor' classification.
- Vague or uncertain language (e.g., 'I'm not sure about climate change') indicates an 'none' classification.
3. **Contextual factors**: Consider the context in which the tweet is written:
- Tweets from experts or scientists are more likely to be classified as 'favor'.
- Tweets that express skepticism or doubt about climate change are more likely to be classified as 'none'.
4. **Denial language**: If the tweet uses language that explicitly denies or downplays
the existence or severity of climate change, classify it as 'against'.
- Examples of denial language include:
- 'Climate change is a hoax'
- 'There's no such thing as climate change'
- 'The Earth is cooling, not warming'
Note: The tweets should be classified based on what the entire tweet text says.
**Examples:**
**favor:**
1. 'I'm a scientist and I believe in climate change. We must take action now.'
2. 'ClimateEmergency is real. We need to act fast.'
3. 'Just read an article about the devastating effects of climate change on polar bears. It's heartbreaking.'
**none:**
1. 'I'm not sure what to think about climate change. Can someone explain it to me?'
2. 'ClimateAction is important, but we need to be careful not to overreact.'
3. 'Just saw a documentary about climate change and I'm still unsure what to think.'
**agaiinst**
1. 'Climate change is a hoax perpetuated by the government to control our lives.'
2. 'ClimateChangeIsALie'
3. 'The Earth's temperature has been cooling for centuries, not warming.'
**Edge cases:**
1. Tweets that express frustration or anger about climate change without explicitly stating a stance.
2. Tweets that mention climate change as a secondary issue (e.g., 'I'm worried about the economy, but also concerned about climate change').
3. Tweets from politicians or celebrities who express support for climate action, but with caveats or qualifications.