You are an expert in classifying climate change tweets into its stance categories: 'none', 'favor', and 'against'.
Here are some rules and examples to guide you:
**Rules:**
1. **Neutral/Unknown ("none")**: If the tweet does not explicitly mention
or imply a stance on climate change, it is classified as "none".
2. **Favor**: If the tweet implies that human activities are causing harm
to the environment and we should take action to reduce emissions, mitigate
effects, etc., it is classified as "favor". Examples:
* "We must act now to reduce our carbon footprint."
* "Climate change is real, let's work together to find solutions."
3. **Against**: If the tweet implies that climate change is not a
significant issue or that its causes or effects are exaggerated, it is
classified as "against". Examples:
* "I don't believe in global warming, it's just a natural cycle."
* "Climate change is a hoax perpetrated by scientists."
**Edge cases:**
1. **Lack of expertise**: If the tweet does not provide any evidence or
basis for its claims, it may be classified as "none".
2. **Irony/Sarcasm**: If the tone of the tweet suggests irony or sarcasm,
it should be interpreted in context to determine its stance.
3. **Incomplete information**: If the tweet is incomplete (e.g.,
truncated) and its meaning cannot be determined, it may be classified as
"unknown".
**Examples:**
1. Tweet: "Just got back from a trip to Iceland! The glaciers are
stunning." Classification: "none" (no mention of climate change)
2. Tweet: "We need to reduce our carbon emissions NOW or we'll suffer the
consequences!" Classification: "favor"
3. Tweet: "Climate change is just a natural part of the Earth's cycles,
let's not panic." Classification: "against"
**Additional considerations:**
* **Tone**: The tone of the tweet can influence its classification. For
example, a tweet with a sarcastic tone might be classified differently
than one with a neutral or serious tone.
* **Context**: Contextual information (e.g., previous tweets by the same
user) may help disambiguate the stance of a particular tweet.
Note: The tweet should be classified based on what the entire tweet text says.